Drilling-machine.



R. F. MA$ON. DRILLING MACHINE. APPLICATION FILED MAILZZ, 1911.

Patented Dec. 5, 1911.

1 2SHEETSSHEET 1.

R. F. MASON.

DRILLING MACHINE. APPLICATION FILED MAR.22,1911.

1,010,657, Patented Dec.5, 1911 I 2 BHBETSSHEET 2.

Jay/$7,655 e5 v 172F622 far 7 Manama r.

DRILLING-MACHINE.

Mason, or nrsnorvinnn, sourn canomnn, As's renon or ONE-HALF T onnn'nnsA. nrvmn or rnn vxmn, non'rn oanomna.

Application filed March 22, 1911. Serial No. 616,138.

' To all whom it may concern:

understood, reference is had to the action 1 'p'anymg drawings formingapart of this Be it lniown that I, RICHARD F. .Mason, a citizen of theUnited States, residing'at Bishop-ville, in the county of Lee and Stateof South vCarolina, have invented certain new and useful Improvements inDrilling Machines, of which the following is a specification.

a This invention relates to machines for drilling a series or group of"holes according tea pattern.

It is the objectof the present invention to provide a multiple-spindledrilling machine of the kind stated embodying certain novel structuraldetails to be hereinafter described.

and claimed. p

The invention alsolhas for its ob ect to provide improved means forfeeding thedrills into the work, acam-actuated lever bemg provided whichengages the drill spindles to depress the same.

In order that the invention maybe-better specification, in which'-Figure 1 1s anelevation of the mach ne;

Fig. 2 is a plan view, and Fig. 3 is a sectional detail on the line 3'3of Fig. 1

Referring specifically to the drawings, 5 denotes theframe'of themachine, said frame being suitably arranged to su'pportthe several partsto be hereinafterdescribed.

The work is clamped on a carriage 6 x which is slidable on balls 7 whichlatter run in grooves 8 in a sub-carriage 9 mounted on balls 10 runningin grooves'll formedin a suitable support carried by the frame of themachine. The grooves 8 and 11 run at right angles with respect. to eachother so that the work may be shiftedabout in any direction in ahorizontal plane. The pattern is carried on a block 12, and a tracer 13secured to the carriage 6; and cooperating with-the pattern, shifts thecarriage in a well known manner. I D

At 14 are indicated the drill, spindles, they being arranged vertically,and supported forrotary' and sliding movement in the direction of theirlength, by suitable bearings stroke.

PatentedDec. 5, 1911;

springs l'l are-interposed, said springs bemg provided for the purposeof elevating the spindles at, the end of their working The spindles aregeared together by pinions 18, and on one of the spindles is which is inmesh with a spur wheel 25 fas t on a shaft The shafts 22 and 26 arevertical and supported bybearings carried by 'mounted a drive pulley 19suitably conthe arms 15. On the'shaft 26 is also made fast a pinion 27which is in mesh with a spur wheel 28- carried by one of a' pair ofclutch members mounted on the} shaft 22, said member being a sleeve' 29loose on said shaft.v The other one of the clutch mom hers is a sleeve30 which is splined on the shaft 22. =The opposite ends of these twoclutch sleeves have teeth which are adapted to interlock, and when. inthis position the I motion of the sleeve 29 is transmitted to the shaft22. When the sleevesere disconnedbed the sleeve 29- runs, idle and nomotion is transmitted to the shaft 22. A lever 31 is provided forshifting the clutch member 30,

said lever being pivoted to an upright 32 of the supporting frame, asindicated at and operatively connected to the clutch member in anysuitable manner.

The upper end of the shaft 22 carries a cam wheel 3 arranged"horizontally, the loweredge of the rim of said wheel being shapedtoproduce a cam. The cam surface at'the point 35 is-not as low as thecam surface at the point 36 which gives a very grad ual downwardmovement to the drill spindles with one revolution of the cam 'wheel.

The cam'wheel herein described is located above the drill spindles, andbetween said wheel and the upper ends of the drill spin dles isinterposed a lever 37 which is pivoted is intengagement with the cam.

The lever 37 also carries adjusting screws 41 which are so-located thatthey are in contact with the upper ends of the drill spindles 14. Thesescrews ermit close adjustment of the ion h of t e drill spindles andthey are, secure in'adjusted position by lock nuts 42. The top edge outthe cam wheel 84 is engaged by a roller l-3 supported by bearings 44carried by horizontal arms 45. To the free end of the lever 37 is alsoconnected one end of a coiledspring 46, the other end of which isconnected to a stem l? adjustably supported on a bracket arm 48 a seriesof holes in said stem, the adjustment of the stem being for the purposeof regulating the tension of the spring. The function of the s ring 46is. to .ieldingly' hold the roller 39 111 cont-act with t is cam 34.

From the periphery of the cam wheel 34 projects a in 50 which is,adaptedto be engaged b a cam whee said holding device comprising a lever51 which is pivotedat 52 to the upright 32, and has, adjacent to itsfree end,-

a notch 53 adapted-tobe entered by the lug. The lever '51 is connectedto the lever 31 bya bar 54 connected at its lower end by a wire 55 to afoot pedal 56. To the other end of the bar 54 is fastened one end of acoiled spring 57, the other end. of which is made fast to a stem 53which is adjustably V mounted in the same manner as the stem 47.

The spring 57 normally holds the lever 51 in a position to lock the camwheel, and the lever 31 in a position to disengage the clutch member 30'from the clutch: member 29. When the cam wheel is locked the lug seatsin the notch 53.

The operation of the machine is as lows: The work mounted on thecarriage 6 is shifted about by means of the tracer 13. After the workhas been properly positioned with respect-to the drill spindles, thelatter tated together 'tion of the shaft 26 is the engagement aredepressed to effect the} drilling operation, this being accomplished inthe following manner: The drill spindles 14 are rothrough the gears l8.-One of these 'gears'transmits the rotary motion of the spindles to'thegear 20, and through is transmitted to Upon depressing the foot 30 isengaged member 29 so that the monow transmitted, through the gears 27and 28, and the clutch mechanism, to the shaft 22. Simultaneous of theclutch member the shaft 26.

with the clutch by means of pins 49 passing through two of into the pathof the lug elding device for looking the a pinion on the spindle,

camwheel 30 with the clutch member 25'), the lever 51 is SWUH"dowmvardly'and disengaged from the lug o0, thus releasing the cam wheel34, so that it may rotate with the left The rotation of the cam wheel,by reason of its engagement with the roller 39, depresses the lever '37,and this motion of the lever is transmitted through the adjusliilgscrews 41 to the drill spindles 14, thereby feeding the latterdownwardly into the work. At the end of the downward. feed of the drillspindles, the springs 17 elevate the same to their normal position, saidsprings being compressed as the spindles are fed downwardly. The pedalwill also be released, whereupon the spring 57 swings the lever 31 in adirection to disen age the clutch members 29 and 30 and at t 1e sametime to place the lever 51 in a position to lock the cam wheel, the freeend of said lever extending 50 so that the latter may slip into thenolnh 53 when it reaches the same. That portion of the lever 51 thep'inionfil) is such that the pinion18 will not, become disengagedtherefrom during the a longitudinal I. claim: 1. In a drilling machine,a drill spindle, a cam wheel rotatable behind the spindle, a leverlocated between the cam and the spindle to feed the same, driving meansfor movement of the drill spindles.

the cam wheel, a clutch for the driving,

means, a lock for the cam wheel, and means for simultaneously actuatingthe clutch and the lock. 2. In a drilling machine, a drill spindle, acamwheel rotatable behind the spindle, a lever located between the cam Vand the spindle to feed the same, driving means for t e cam wheel, meansfor "throwing said driving means into and out of gear, and a lock forthe cam wheel. g 3. In a drilling machine, a drill spindle, a cam wheel,a shaft on which a sleeve loose on the cam wheel shaft, a pair ofpinions on the sleeve-,one of said pinions meshing with the pinionofithe spindle, a second shaft, a spur wheel on said second shaft inmesh with the other one of the pinions of the sleeve, clutch members onthe cam wheel shaft, one ofsaid members being:

the cam wheel is mounted,

geared to the second ,shaft,and the other member having a drivingconnection with the cam wheel shaft, and a lever located be tween thecam wheel and the spindle to feed the same. 5 v i 1 4. In adr'illingmachine, a drill spin dle,; a rotatable behind the spindle; M1125leverlocated bet-ween the cam wheel and the 1,010,857- I Q a sgindle tofeed thelatte r, drivin means for operated to reiease-the am when theciutch t e v c'am wheel, a clutch for t e drivin is thrown means, alever for o erating the clutch, a" In testimony whereof I afix mysignature lug extendlng from t e cam wheel, a lever in presence of twowitnesses.

5 having a notch in which'the lug 1s ada ted RICHARD F. .nnson to seatwhereby the' cam wheel is 100 ed, Witnesses: and a connection betweensaid lever and the R. L. Roam,

clutch lever whereby the notched lever 1s J. H. ELLEN.

